Arrangement for internal-combustion engines



Oct. 11, 1955 SCHEITERLEIN ARRANGEMENT FOR INTERNAL-COMBUSTION ENGINESFiled DEC. 29, 1952 United States Patent ARRANGEMENT FORINTERNAL-COMBUSTION ENGINES Andreas Scheiterlein, Graz, Austria,assignor to Gustav Ospelt, Vaduz, Liechtenstein Application December 29,1952, Serial No. 328,381

Claims. (Cl. 123-495) The invention relates to an arrangement of acooling water pump and a dynamo for internal-combustion engines, inwhich the cooling water pump and the dynamo are coaxial and drivenjointly. Such coaxial arrangements of a cooling water pump and a dynamowith a joint drive are known in internal-combustion engines and affordthe advantage of a better utilization of space and of a simplificationof the drive. In those known arrangements the cooling water pump and thedynamo are separately mounted to the engine housing. In particular inconstructions in which the impeller of the water pump is arranged on theshaft stub of the dynamo, that arrangement involves difiiculties inassembly. In such constructions the accurate adjustment of the clearancebetween the impeller and pump casing, which adjustment is controllingfor the efiiciency of the water pump, is complicated and time consumingbecause that adjustment must be effected during the assembly of theunits with the engine.

The invention has as its object to eliminate these disadvantages andessentially resides in the fact that the casing of the cooling waterpump and the support for the dynamo are connected suitably by a commonor joint baseplate, to form a unit that can be attached to theinternal-combustion engine, to enable a joint machining of the casing ofthe pump and of the support of the dynamo. The joint machining of thecasing of the water pump and of the support for the dynamo, whichmachining can then be effected conveniently with the same chucking,ensures accurate alignment of the casing axis with the axis of thedynamo. Now the unit can be assembled easily and in a simple mannerindependently of its attachment to the engine Without requiring aspecial adjustment. Particularly in the case of arrangements in whichthe impeller of the water pump is mounted directly on a shaft stub ofthe dynamo, the advantage results that the proper setting of theimpeller relative to the casing is ensured. In that case the casing ofthe cooling water pump, the support for the dynamo and the common orjoint baseplate, if provided, suitably consist of a single casting, tosimplify the manufacture.

In the drawing the invention is illustrated diagrammatically withreference to an example.

Fig. 1 is a top plan view of the unit consisting of the dynamo and thecooling water pump, the latter being shown in axial section.

Fig. 2 is a top plan view of the pump casing and the support for thedynamo.

Fig. 3 is a sectional view taken along line III-III of Fig. 1, and

Fig. 4 is a sectional view taken along line IV-IV of Fig. 1.

The impeller 1 of the cooling water pump is located by means of a screwcap 4 on the shaft stub 2 of the dynamo 3 and rotates within the pumpcasing 5 designed as a volute casing. The suction bend 6 is fixed to thepump casing by means of screws 7. The clearance 8 between the impeller 1and the suction bend 6 must be adjusted most accurately to obtain a highefliciency. 9 is the support for the dynamo 3 and is formed with a fiatcurved depression according to the shape of the casing of the dynamo.

The pump casing 5 is connected to the support 9 through the intermediaryof a baseplate 10. As shown by the example given in the drawing, thecasing 5 forms a single casting with the support 9 and the baseplate 10.The dynamo 3 is located on its support by means of a bail 11, which istightened by screws 12 screwed to the support 9. The supporting surfaceof the support 9 and the casing 5 having been machined jointly, accuratealignment of the axis of the dynamo with the casing axis is ensured andno difficulties will be encountered in the assembly of the unitconsisting of the dynamo and water pump. By means of the common or jointbaseplate 10, that unit can be located at the engine housing 13 by meansof screws 14. As shown in Fig. 3 of the drawing, the engine housing isformed with a sealing surface 15, to which the discharge branch 16 ofthe cooling water pump is connected so that the water outlet of the pumpand the inlet to the engine extends directly through the commonbaseplate 10, which also has a sealing surface cooperating with thesealing surface 15.

I claim:

1. In an assembly principally for internal combustion engines thecombination comprising a base plate; supporting means carried by theplate, a dynamo axially adjustably supported by the supporting means andincluding a shaft, a rotary cooling water pump including a casingsecured to the plate coaxially with the dynamo and enclosing a shaft endportion and including an impeller wheel within the casing secured to theshaft end portion and means securing the dynamo in a predetermined axialposition on the supporting means.

2. The combination according to claim 1 and also comprising a suctionpipe detachably mounted on the casing and closing an opening throughwhich the impeller wheel can be inserted for securement to the shaft andwherein the impeller wheel is adjustably secured to the shaft by a screwcap.

3. The combination according to claim 1 and also comprising an enginehousing having a hole and a sealing surface adjacent to the hole andwherein the base plate has a sealing surface coacting with the firstmentioned sealing surface and the casing includes a delivery conduitregistering with the hole.

4. The combination according to claim 1 and wherein the supporting meanshas a trough-shaped depression and the securing means is a tensioningmember attached to the supporting means.

5. The combination according to claim 4 and wherein the base plate, thesupporting means and pump casing constitute a single casting.

References Cited in the file of this patent UNITED STATES PATENTS1,422,995 Link July 18, 1922 1,442,108 Vincent Jan. 16, 1923 1,672,191Anderson et al. June 5, 1928 2,037,083 McCormick Apr. 14, 1936 FOREIGNPATENTS 797,157 France Apr. 22, 1936

